kolibrios/drivers/include/linux/asm/scatterlist.h
Sergey Semyonov (Serge) 1070204c9a drivers: udpate ddk
git-svn-id: svn://kolibrios.org@3297 a494cfbc-eb01-0410-851d-a64ba20cac60
2013-03-01 06:44:14 +00:00

37 lines
872 B
C

#ifndef __ASM_GENERIC_SCATTERLIST_H
#define __ASM_GENERIC_SCATTERLIST_H
#include <linux/types.h>
struct scatterlist {
#ifdef CONFIG_DEBUG_SG
unsigned long sg_magic;
#endif
unsigned long page_link;
unsigned int offset;
unsigned int length;
dma_addr_t dma_address;
#ifdef CONFIG_NEED_SG_DMA_LENGTH
unsigned int dma_length;
#endif
};
/*
* These macros should be used after a dma_map_sg call has been done
* to get bus addresses of each of the SG entries and their lengths.
* You should only work with the number of sg entries pci_map_sg
* returns, or alternatively stop on the first sg_dma_len(sg) which
* is 0.
*/
#define sg_dma_address(sg) ((sg)->dma_address)
#ifdef CONFIG_NEED_SG_DMA_LENGTH
#define sg_dma_len(sg) ((sg)->dma_length)
#else
#define sg_dma_len(sg) ((sg)->length)
#endif
#define ARCH_HAS_SG_CHAIN
#endif /* __ASM_GENERIC_SCATTERLIST_H */